CN117822453A - Water positioning method for pressure-bearing pontoon of floating bridge - Google Patents

Abstract

The invention discloses a method for positioning a floating bridge pressure buoy on water, comprising: step one, setting up a bottom platform and a berthing pier; step two, using a tugboat to drag the buoy to the vicinity of the bottom platform; step three, completing the initial positioning of the buoy through four platform winches on the bottom platform and the berthing pier winches on the berthing pier; step four, injecting ballast water into the buoy to sink the buoy; step five, seating the buoy on the bottom platform; step six, starting a pair of longitudinal jacks and two pairs of transverse jacks on the bottom platform to fine-tune the plane position of the buoy; step seven, after sequentially performing the pier body height connection process and the pier body and main beam connection process on the buoy, first use a water pump to pump out the ballast water in the buoy to float the buoy, and then use a tugboat to drag the buoy together with the pier body and the main beam on the buoy away from the working area of the bottom platform. The invention can ensure the stability of the buoy in water, and facilitate the subsequent docking of the buoy with the pier body and the pier body with the main beam.

Description

A method for positioning floating bridge pressure buoy on water

Technical Field

The invention relates to a method for positioning a floating bridge pressure buoy on water.

Background technique

In the past 30 years, floating bridges have been applied to modern infrastructure construction. Their technology has developed rapidly and gradually matured, and can be used as an important part of modern infrastructure. However, compared with land bridges including cable-stayed bridges and suspension bridges, the current data on floating bridges is still very limited, especially the data on construction records, environmental conditions, durability, operation and performance of floating bridges. At present, the number of long floating bridges in the world is very limited, only about 20.

Most of the floating bridges built abroad are continuous pontoon structures. The square pontoons at the bottom of this type of floating bridge are connected end to end to form a continuous floating structure. The upper part of the pontoons can directly bear vehicle traffic loads, and piers or frame structures can also be set up to increase the bridge deck elevation.

In the existing floating bridge construction process, a splicing structure is generally used. A floating bridge connector is set between the floating bridge units. The floating bridge connector connects the floating bridge units to each other to form an integral floating bridge structure. Since the docking accuracy of the steel structure floating bridge is high, that is, when the floating buoy of the water steel structure is docked with the pier body and the pier body is docked with the main beam, the positioning accuracy of the floating buoy is required to be high. The floating buoy is in a floating state, and the positioning is more difficult. Therefore, how to ensure the stability of the buoy in the water is a key issue that needs to be solved urgently.

Summary of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a method for positioning the pressure buoy of a floating bridge on water, which can ensure the stability of the buoy in water and facilitate the subsequent docking of the buoy with the pier body and the pier body with the main beam.

The object of the present invention is achieved by: a method for positioning a floating bridge pressure buoy on water, comprising the following steps:

Step one, erect a base platform and a berthing pier, the base platform includes steel pipe piles driven on the seabed, a platform plate fixed on the top surface of the steel pipe piles, four platform limit columns and a plane fine adjustment mechanism installed on the platform plate; the steel pipe piles include left-side steel pipe piles, right-side steel pipe piles and the first row of transverse steel pipe piles to the sixth row of transverse steel pipe piles; the first row of transverse steel pipe piles and the sixth row of transverse steel pipe piles are each composed of two steel pipe piles, and the second row of transverse steel pipe piles to the fifth row of transverse steel pipe piles are each composed of three steel pipe piles; the platform plate includes a middle longitudinal distribution beam fixed between the top surface of the left-side steel pipe pile and the top surface of the right-side steel pipe pile, two side longitudinal distribution beams fixed one-to-one to the front and rear of the second to fifth rows of transverse steel pipe piles, a first short transverse distribution beam and a second short transverse distribution beam fixed one-to-one to the top surface of the first row of transverse steel pipe piles and the top surface of the sixth row of transverse steel pipe piles, and a first short transverse distribution beam fixed one-to-one to the top surface of the second row of transverse steel pipe piles, a third row of transverse steel pipe piles, and a fourth row of transverse steel pipe piles. The first long transverse distribution beam to the fourth long transverse distribution beam on the top surface of the steel pipe pile, the top surface of the fourth row of transverse steel pipe piles and the top surface of the fifth row of transverse steel pipe piles; four platform limit columns are installed one by one on the rear top surface of the first long transverse distribution beam to the fourth long transverse distribution beam, and a berthing column working platform is fixed on each of the four platform limit columns, and each berthing column working platform is respectively installed with a platform winch; the plane fine adjustment mechanism includes a one-to-one corresponding longitudinal jack installed at both ends of the middle longitudinal distribution beam and two pairs of one-to-one corresponding transverse jacks installed at both ends of the first short transverse distribution beam and at both ends of the second short transverse distribution beam; the berthing pier is arranged on the side of one end of the middle longitudinal distribution beam of the bottom platform and includes a berthing pier foundation fixed on the seabed, a berthing pier column fixed on the berthing pier foundation and a berthing pier working platform installed on the berthing pier column, and the berthing pier working platform is installed with a berthing pier winch;

Step 2: Drag the buoy to the vicinity of the bottom platform, set four side rope piles, one end rope pile and a water pumping and injection port on the top surface of the buoy; install a prism at each of the four corners of the bottom pier body at the center of the top surface of the buoy;

Step 3: first, tie the wire rope of the berthing pier winch and the wire ropes of the four platform winches to the end cable pile and the four side rope piles on the buoy one by one, then start the four platform winches to make the buoy dock on the four platform limit columns, and then start the berthing pier winch to make one end of the buoy close to the berthing pier column, thus completing the initial positioning of the buoy;

Step 4: Place a water pump on the buoy to inject ballast water into the buoy, and simultaneously loosen the wire ropes of the berthing pier winch and the four platform winches to sink the buoy;

Step 5: During the sinking process of the buoy, the elevation of the buoy is measured, and the water injection amount is calculated by measuring the water depth in the buoy, and the top elevation of the buoy is measured at the same time; when the water injection amount increases and the change in the top elevation of the buoy is much smaller than the change in the water depth, it is determined that the buoy has sat on the bottom platform, and water injection is stopped at this time;

Step 6: Use the total station to measure the prisms at the four corners of the bottom pier on the pontoon to determine the plane position deviation of the pontoon, start a pair of longitudinal jacks and two pairs of transverse jacks on the bottom platform, fine-tune the plane position of the pontoon, and use the total station to re-measure synchronously until the error meets the specification requirements to complete the precise positioning of the pontoon;

Step seven, after carrying out the pier body heightening process and the pier body and main beam connection process on the pontoon, first use a water pump to pump out the ballast water in the pontoon to make the pontoon float, and then drag the pontoon together with the pier body and main beam on the pontoon away from the working area of the base platform.

The above-mentioned method for positioning the pressure-bearing buoy of a floating bridge in water, wherein, when performing step one, transverse parallel connections are arranged between each row of transverse steel pipe piles, and longitudinal parallel connections are arranged between the first row of transverse steel pipe piles to the sixth row of transverse steel pipe piles; the transverse parallel connections are connected between the four platform limit columns; and a diagonal brace is arranged on the rear side of each platform limit column.

The above-mentioned method for positioning the pressure-bearing buoy of a floating bridge in water, wherein, when performing step one, the plane of the berthing pier foundation is a right-angled triangle and includes three berthing pier steel pipe piles and a berthing pier foundation platform arranged on the top surface of the three berthing pier steel pipe piles; the berthing pier column is connected to a berthing pier steel pipe pile close to the middle longitudinal distribution beam, and a diagonal brace is arranged between the berthing pier column and the berthing pier foundation platform.

In the above-mentioned method for positioning the pressure-bearing buoy of a floating bridge on water, when performing step five, the water depth in the buoy is measured every 10 cm.

The method for positioning the pressure-bearing buoy of a floating bridge on water of the present invention has the following characteristics: a bottom platform and a pier are set up on water, and a winch is set on each of the bottom platform and the pier, the buoy is dragged above the bottom platform, and then ballast water is injected into the buoy so that the buoy is seated on the bottom platform, and then the plane position of the buoy is adjusted by a plane fine adjustment mechanism set on the bottom platform to complete the precise positioning of the buoy. The bottom platform and the pier used in the present invention not only provide stable support for the buoy, but also prevent the buoy from being washed away or floating by the water flow, and can also avoid causing harm or damage to the buoy, so as to facilitate the subsequent docking of the buoy with the pier body and the pier body with the main beam.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a plan view of a base platform set up when performing step 1 of the present invention;

Fig. 2 is a view in the direction of A-A in Fig. 1;

Fig. 3 is a B-B view in Fig. 1;

Fig. 4 is a C-C view in Fig. 1;

FIG5 is an elevation view of a berthing pier erected during step 1 of the present invention;

FIG6 is a plan view of a buoy that needs to be positioned when performing step 2 of the present invention;

FIG7 is a first state diagram when performing step three of the present invention;

FIG. 8 is a second state diagram when performing step three of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to FIGS. 1 to 8 , the method for positioning the floating bridge pressure buoy in water of the present invention comprises the following steps:

Step 1: Set up the base platform 1 and the berthing pier 2. The base platform 1A includes steel pipe piles driven on the seabed, a platform plate fixed on the top of the steel pipe piles, four platform limit columns 15 installed on the platform plate, and a plane fine adjustment mechanism; wherein:

The steel pipe piles include a left steel pipe pile 13a, a right steel pipe pile 13b and first to sixth rows of transverse steel pipe piles 131-136; the first row of transverse steel pipe piles 131 and the sixth row of transverse steel pipe piles 136 are each composed of two steel pipe piles, and the second row of transverse steel pipe piles 132 to the fifth row of transverse steel pipe piles 135 are each composed of three steel pipe piles; longitudinal parallel connections are arranged between the first row of transverse steel pipe piles 131 to the sixth row of transverse steel pipe piles 136; transverse parallel connections are arranged between each row of transverse steel pipe piles;

The platform plate includes a middle longitudinal distribution beam 140 fixed between the top surfaces of the left steel pipe piles and the top surfaces of the right steel pipe piles, two side longitudinal distribution beams 141 fixed one-to-one to the front and rear parts of the second row of transverse steel pipe piles 132 to the fifth row of transverse steel pipe piles 135, a first short transverse distribution beam 142 and a second short transverse distribution beam 143 fixed one-to-one to the top surfaces of the first row of transverse steel pipe piles 131 and the sixth row of transverse steel pipe piles 136, and a first long transverse distribution beam 144 to a fourth long transverse distribution beam 147 fixed one-to-one to the top surfaces of the second row of transverse steel pipe piles 132, the third row of transverse steel pipe piles 133, the fourth row of transverse steel pipe piles 134 and the fifth row of transverse steel pipe piles 135;

Four platform limit columns 15 are installed one by one on the top surfaces of the rear parts of the first long transverse distribution beam 144 to the fourth long transverse distribution beam 147. The four platform limit columns 15 are connected by transverse parallel connection, and a diagonal support frame is provided on the rear side of each platform limit column 15; a berthing column working platform 150 is fixed on each of the four platform limit columns 15, and each berthing column working platform 150 is installed with a platform winch 16;

The plane fine adjustment mechanism includes a longitudinal jack 17 installed one-to-one at both ends of the middle longitudinal distribution beam 140 and two pairs of transverse jacks 18 installed one-to-one at both ends of the first short transverse distribution beam 142 and the second short transverse distribution beam 143 (see Figures 1 to 4);

The berthing pier 2 is arranged beside the right end of the middle longitudinal distribution beam 140 of the bottom platform 1 and comprises a berthing pier foundation 20 fixed on the seabed, a berthing pier column 21 fixed on the berthing pier foundation 20 and a berthing pier working platform 210 installed on the berthing pier column 21, and a berthing pier winch 22 is installed on the berthing pier working platform 210; the berthing pier foundation 20 is in a right triangle plane and comprises three berthing pier steel pipe piles and a berthing pier foundation platform arranged on the top surface of the three berthing pier steel pipe piles; the berthing pier column 21 is connected to a berthing pier steel pipe pile close to the middle longitudinal distribution beam 140, and a diagonal brace is arranged between the berthing pier column 21 and the berthing pier foundation platform (see Figures 1 and 5);

Step 2: Use a tugboat to tow the buoy 3 to the vicinity of the bottom platform 1. An end cable pile 31, four side cable piles 32 and a water pumping and injection port 33 are arranged on the top surface of the buoy 3; a prism 34 is respectively installed at the four corners of the bottom pier 30 at the center of the top surface of the buoy 3 for positioning measurement (see FIG. 6 );

Step 3: first, tie the steel wire rope of the berthing pier winch 22 and the steel wire ropes of the four platform winches 16 to the end cable pile 31 and the four side rope piles 32 on the buoy 3 in a one-to-one correspondence, then start the four platform winches 16 to make the buoy 3 dock on the four platform limit columns 15 (see Figure 7), and then start the berthing pier winch 22 to make the right end of the buoy 3 close to the berthing pier column 21, completing the initial positioning of the buoy 3 (see Figure 8);

Step 4: Place a water pump on the buoy 3, inject ballast water into the buoy 3, and simultaneously loosen the wire ropes of the berthing pier winch 22 and the four platform winches 16 to sink the buoy 3;

Step 5: During the sinking process of the buoy, the elevation of the buoy is measured, and the amount of water injected is calculated by measuring the water depth in the buoy. The water depth in the buoy is measured every 10 cm, and the top elevation of the buoy is measured at the same time. When the amount of water injected increases and the change in the top elevation of the buoy is much smaller than the change in the water depth, it is determined that the buoy has been seated on the bottom platform 1, and water injection is stopped at this time.

Step 6: Use the total station to measure the prisms 34 at the four corners of the bottom pier 30 on the pontoon 3, determine the plane position deviation of the pontoon 3, start a pair of longitudinal jacks 17 and two pairs of transverse jacks 18 on the bottom platform 1, fine-tune the plane position of the pontoon 3, and use the total station to synchronously re-measure until the error meets the specification requirements, and complete the precise positioning of the pontoon 3;

Step seven, after completing the pier body heightening process and the pier body and main beam connection process on the pontoon 3, first use a water pump to pump out the ballast water in the pontoon 3 to make the pontoon 3 float, and then use a tugboat to tow the pontoon together with the pier body and main beam on the pontoon away from the working area of the base platform.

The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims (4)

1. A method for positioning a floating bridge pressure buoy on water, characterized in that the positioning method comprises the following steps: Step one, erect a base platform and a berthing pier, the base platform includes steel pipe piles driven on the seabed, a platform plate fixed on the top surface of the steel pipe piles, four platform limit columns and a plane fine adjustment mechanism installed on the platform plate; the steel pipe piles include left-side steel pipe piles, right-side steel pipe piles and the first row of transverse steel pipe piles to the sixth row of transverse steel pipe piles; the first row of transverse steel pipe piles and the sixth row of transverse steel pipe piles are each composed of two steel pipe piles, and the second row of transverse steel pipe piles to the fifth row of transverse steel pipe piles are each composed of three steel pipe piles; the platform plate includes a middle longitudinal distribution beam fixed between the top surface of the left-side steel pipe pile and the top surface of the right-side steel pipe pile, two side longitudinal distribution beams fixed one-to-one to the front and rear of the second to fifth rows of transverse steel pipe piles, a first short transverse distribution beam and a second short transverse distribution beam fixed one-to-one to the top surface of the first row of transverse steel pipe piles and the top surface of the sixth row of transverse steel pipe piles, and a first short transverse distribution beam fixed one-to-one to the top surface of the second row of transverse steel pipe piles, a third row of transverse steel pipe piles, and a fourth row of transverse steel pipe piles. The first long transverse distribution beam to the fourth long transverse distribution beam on the top surface of the steel pipe pile, the top surface of the fourth row of transverse steel pipe piles and the top surface of the fifth row of transverse steel pipe piles; four platform limit columns are installed one by one on the rear top surface of the first long transverse distribution beam to the fourth long transverse distribution beam, and a berthing column working platform is fixed on each of the four platform limit columns, and each berthing column working platform is respectively installed with a platform winch; the plane fine adjustment mechanism includes a one-to-one corresponding longitudinal jack installed at both ends of the middle longitudinal distribution beam and two pairs of one-to-one corresponding transverse jacks installed at both ends of the first short transverse distribution beam and at both ends of the second short transverse distribution beam; the berthing pier is arranged on the side of one end of the middle longitudinal distribution beam of the bottom platform and includes a berthing pier foundation fixed on the seabed, a berthing pier column fixed on the berthing pier foundation and a berthing pier working platform installed on the berthing pier column, and the berthing pier working platform is installed with a berthing pier winch; Step 2: Drag the buoy to the vicinity of the bottom platform, set four side rope piles, one end rope pile and a water pumping and injection port on the top surface of the buoy; install a prism at each of the four corners of the bottom pier body at the center of the top surface of the buoy; Step 3: first, tie the wire rope of the berthing pier winch and the wire ropes of the four platform winches to the end cable pile and the four side rope piles on the buoy one by one, then start the four platform winches to make the buoy dock on the four platform limit columns, and then start the berthing pier winch to make one end of the buoy close to the berthing pier column, thus completing the initial positioning of the buoy; Step 4: Place a water pump on the buoy to inject ballast water into the buoy, and simultaneously loosen the wire ropes of the berthing pier winch and the four platform winches to sink the buoy; Step 5: During the sinking process of the buoy, the elevation of the buoy is measured, and the water injection amount is calculated by measuring the water depth in the buoy, and the top elevation of the buoy is measured at the same time; when the water injection amount increases and the change in the top elevation of the buoy is much smaller than the change in the water depth, it is determined that the buoy has sat on the bottom platform, and water injection is stopped at this time; Step 6: Use the total station to measure the prisms at the four corners of the bottom pier on the pontoon to determine the plane position deviation of the pontoon, start a pair of longitudinal jacks and two pairs of transverse jacks on the bottom platform, fine-tune the plane position of the pontoon, and use the total station to re-measure synchronously until the error meets the specification requirements to complete the precise positioning of the pontoon; Step seven, after carrying out the pier body heightening process and the pier body and main beam connection process on the pontoon, first use a water pump to pump out the ballast water in the pontoon to make the pontoon float, and then drag the pontoon together with the pier body and main beam on the pontoon away from the working area of the base platform. 2. The method for positioning the pressure-bearing buoy of a floating bridge in water according to claim 1 is characterized in that, when performing step one, transverse parallel connections are arranged between each row of transverse steel pipe piles, and longitudinal parallel connections are arranged between the first row of transverse steel pipe piles to the sixth row of transverse steel pipe piles; the transverse parallel connections are connected between the four platform limit columns; and a diagonal brace is arranged on the rear side of each platform limit column. 3. The method for positioning a floating bridge pressure buoy in water according to claim 1 is characterized in that, when performing step one, the plane of the berthing pier foundation is a right triangle and includes three berthing pier steel pipe piles and a berthing pier foundation platform arranged on the top surface of the three berthing pier steel pipe piles; the berthing pier column is connected to a berthing pier steel pipe pile close to the middle longitudinal distribution beam, and a diagonal brace is arranged between the berthing pier column and the berthing pier foundation platform. 4. The method for positioning a floating bridge pressure buoy in water according to claim 1, characterized in that when performing step 5, the water depth in the buoy is measured every 10 cm.